Results 151 to 160 of about 115,744,936 (297)

Are Rindler Quanta Real? Inequivalent Particle Concepts in Quantum Field Theory [PDF]

open access: yes, 2000
Philosophical reflection on quantum field theory has tended to focus on how it revises our conception of what a particle is. However, there has been relatively little discussion of the threat to the "reality" of particles posed by the possibility of ...
Halvorson, Hans, Clifton, Rob
core  

Graded Polynomial Identities And Specht Property Of The Lie Algebra Sl2

open access: yes, 2015
Let G be a group. The Lie algebra sl2 of 2 × 2 traceless matrices over a field K can be endowed up to isomorphism, with three distinct non-trivial G-gradings induced by the groups Z2, Z2×Z2 and Z. It has been recently shown (Koshlukov, 2008 [8]) that for
Souza M.D.S.   +3 more
core   +1 more source

Latitudinal effect on the structure of snake–prey interaction networks is mediated by snake species richness

open access: yesEcography, EarlyView.
Despite the growing number of studies on trophic networks in recent decades, there are still important gaps in our understanding of how these networks are structured across broad environmental gradients. These gaps are even greater in some groups of terrestrial vertebrates, such as snakes, requiring a cohesive synthesis of their broader trophic ...
Daniela Pinto‐Coelho   +4 more
wiley   +1 more source

Division algebras over an algebraic field [PDF]

open access: yesBulletin of the American Mathematical Society, 1931
openaire   +2 more sources

Machine Learning Unveils Isolated‐Surrounded Pt Motifs in High‐Entropy Alloys for Superior Low‐Temperature Ammonia Oxidation

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A physics‐informed machine learning approach successfully decodes the complex catalytic activity of high‐entropy alloys for ammonia oxidation. By revealing a synergistic mechanism involving lattice and electronic couplings, the study identifies a superior “isolated‐surrounded” platinum motif.
Shangfeng Jiang   +5 more
wiley   +1 more source

A verified algebra for read-write linked data

open access: yes
The aim of this work is to verify an algebra for high level languages for reading and writing Linked Data. Linked Data refers to a collection of standards which aim to enhance the world’s data, by interlinking datasets through the Web. The starting point
Horne, Ross, Sassone, Vladimiro
core   +1 more source

Employing the Moving Least‐Squares Aided Finite Element Method to Study Heat Transfer Phenomenon in Closed‐Cell Polymeric Foam

open access: yesInternational Journal for Numerical Methods in Fluids, EarlyView.
Employing the moving least‐squares aided finite element method (MLS‐FEM) allows detailed thermal analysis in complex porous structures, such as polymeric foams, where the conductive heat transfer mechanism governs in the solid matrix and the convective mechanism dominates within the gas‐filled voids.
Mehdi Mostafaiyan   +2 more
wiley   +1 more source

The left and right dimensions of a skew field over the subfield of invariants [PDF]

open access: yes, 2017
© 2017 Elsevier Inc.If H is a Hopf algebra and A an H-module algebra without nontrivial H-stable left or right ideals, then the subalgebra of H-invariant elements AH is a skew field and A may be regarded as a vector space over AH with respect to either ...
Skryabin S.
core  

Immersed Boundary Projection Method for Boundaries With Slip Velocities

open access: yesInternational Journal for Numerical Methods in Fluids, EarlyView.
A formulation of the immersed boundary method for incompressible flow over arbitrarily‐shaped bodies with surface slip described by the Navier boundary condition is presented. The wall slip velocity and the boundary force are determined implicitly through a projection to satisfy both the boundary condition and the divergence‐free condition of the ...
Takehiro Fujii, Takeshi Omori
wiley   +1 more source

A Multi‐Objective Periodic Vehicle Routing Model for Sustainable Healthcare Waste Collection

open access: yesThe International Journal of Health Planning and Management, EarlyView.
ABSTRACT The collection of infectious waste from healthcare facilities (HCF) constitutes a recurring operational challenge. Indeed, despite the inherent health risks posed by the storage and the transportation of infectious materials, most of the existing waste collection systems tends to prioritise cost optimization and to underaddress the safety ...
Hajer Ben‐Romdhane
wiley   +1 more source

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